Safety stop-motion for grinding-machines.



"0; 594,096. I Patented Feb. 25, I902.

' n. P. FILLINGHAM.

SAFETY STOP IUTION FUR GRINDING MACHINES.

(Application 81nd Oct. 24, 1901 2 Sheen-Shout I.

(No Model.)

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llu. HIII, lllly "lllll No. 694,096. Patentodfeb. 25, I902.

' N. P. FILLINGNAN. SAFETY STOP MOTION FOR GRINDING MACHINES;

(Lppliclficn filed 0 ct. 24, 1

(No Nodal.)

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yxaacwzfi UNiTED STATES PATENT OFFICE.

MYLES P. FILLINGHAM, OF ANSONIA, CONNECTICUT.

SAFETY STOP-MOTION FOR GRINDING-MACHINES.

SPECIFICATION forming part Of Letters Patent NO.,694,09 6, datedFebruary 25, 1902.

, Application filed October 24, 1901. serial 7 (N model-l To all whom itmay concern.-

Be it known that I, MYLES P. FILLINGHAM, a citizen of the United States,residing at Ansonia, county of New Haven, State of Connecticut, haveinvented a new and useful Safety Stop-Motion for Grinding-ll/Iachines,of which the following is a specification.

Myinvention relates generally to machines using two heavy rolls betweenwhich the hand of an operator is liable to be caught while feeding ortending the machineas, for example, the invention is admirablyadaptedfor use upon rubber grinding-machines, so called, although the principleis equally applicable to various other types of machines notnecessarilygrinders; and myinvention hasfor its object to provide asafety stop-motion applicable generally to two-roll machines.

WVith this end in view my invention consists in the novel constructionand combination of parts, as hereinafter set forth and then specificallypointed out in the claims.

In the accompanying drawings, forming part of this specification, Figure1 is an elevation of a two-roll grindingqnachine, showing theapplication thereto of my novel stopmotion; Fig. 2, a view showing aportion of the machine in end elevation as seen from I the left in Fig.1, the neck of the front roll as seen in Fig. 1 being in section on theline 2 2 and the parts comprising the stop-motion/ being in thenormal-that is,the inoperative position, as when the machine is in use,the position of the lever after it is tripped being indicated by dottedlines; Fig. 3, a similar view showing the front roll as seen in Fig. 1

in section on the line 2 2 and the back roll in section on the line 2 3,the rolls having made approximately a quarter-turn from the positionshown in Fig. 2 and the rotary movement of the eccentric bearing-sle'eves,one only being shown, having commenced; and Fig. 4 is a viewsimilar to Fig. 3, except that the rotary movement of the eccentricbearingsleeves, one onlybeing shown, has raised the roll and placed thegear-wheel out of en gagement withthe driving-pinion.

1 0 denotes the framework, which may be of any ordinary or preferredconstruction; 11, the front roll, and 12 the back roll.

I have used the terms front and back for convenience only, my novelstop-motion being applicable to either roll and it being whollyimmaterial which is made movable. Inthe present instance I have shownthe stopmotion as applied to the roll which I have termedthe front roll.The back roll is journaledin boxes 13, and the front roll is journaledin eccentric bearing-sleeves 14-, which are rotatable in boxes 15.

By the term eccentric as appliedto the bearing-sleeves I mean sleeveshaving an.internal circumference eccentric to their externalcircumference, so that the walls of the sleeves increase in thickness inboth directions from their thinnest portion to a point diametricallyopposite to the thinnest portion. Boxes 13 and 15 are shown as lyingside by side in recesses 16 in the framework. It should be understood,however, that these details of construction are wholly unimportant sofar as the principle of the invention is concerned and, furthermore,that both ends of the front roll are journaled ineccentric'bearing-sleeves and that both bearingsleeves are turnedtogether, as will be more fully explained one only of thebearingsleeves, however, appearing in the drawings.

It is of course not important, so far as my novel stop-motion isconcerned, by what special style of gearing the rolls are driven. I haveshown one of the necks 18 of the-front roll as provided with agear-wheel 32, which meshes with a pinion 33 on a shaft 34, which may bedriven in any suitable manner. The

necks at the opposite ends of the rolls from the gear-wheel and thedriving-pinion are provided with intermeshing pinions 36, by means ofwhich the back roll is driven from the front roll.

The important feature of my invention is that the rolls may be stoppedeasily and quickly without stopping the rotation of the driving-shaftand that simultaneously the rolls are separated. This result Iaccomplish by means of the eccentric bearing-sleeves, to which rotarymovement is imparted in the manner I shall presently describe, The necksofthe front roll rotate in the usual manner in the eccentricbearing-sleeves, the roll being moved toward or from the back roll byrotation of these sleeves in boxes 15. In the .op-

erative position of the rolls the bearing-sleeves lie with the thinnestportions of their walls,

ICO

position, as shown in Fig. 2.

which I have specifically indicated by 35, in direct line with pinion33, (see Fig. 2,) so that the instant the sleeves commence to rotateconstantly-thickening walls will pass between I the necks and the boxesin which they are seated at a point in line with the drivingpinion. Theeccentricity of the walls of the sleeves is sufficient so that in lessthan a revolution of the rolls the gear-wheel will be moved upward andoutward wholly out of engagement with pinion 33, as clearly shown inFig. 4, and the rolls will also be separated an equal distance, thusrelieving the pressure should a hand be caught between them, theseparation of the rolls commencing the instant the eccentricbearing-sleeves commence to turn.

The eccentric bearing-sleeves are provided with arms 17, which liebetween the ends of the rolls and the framework and may be madedetachable from the sleeves.

1S denotes the necks of the rolls, and 19 shoulders between the necksandthe operative portion of the rolls, the shoulders being of lessdiameter than the operative portions of the rolls.

20 denotes pins, one at each end of the front roll, which extend fromthe ends of the operativo portions of said roll above the shoulders andthe purpose of which will presently be explained. In the presentinstance I have shown the eccentric bearing-sleeves as provided withflanges 21 and have shown arms 17 as made separate from the flanges andattached thereto by lug-and-notch connections, as at 22.

23 denotes levers pivoted to arms 17, and 2st pins on arms 17, which areadapted to be engaged by the short arms of the levers when thestop-motion is operated, as will be more fully explained.

25 denotes a cross-rod extending between the inner sides of theframework, the ends of said cross-rod lying in oblique recesses 26 inthe framework. Within recesses 26 are springs 27, which normally holdthe cross-rod at the upper ends of the recesses, as in Figs. 2 and 4.Arms 17 lie normally in engagement with the cross-rod, and the eccentricbearingsleeves are thereby locked in the inoperative Levers 23 arenormally held in approximately a horizontal position, as in Fig. 2, bymeans of trips 28, which engage the long arms of the levers, the lowerends of the trips being shown as provided with inwardly-extending lugs29, and the long arms of the levers being provided in their under sideswith notches to receive the lugs and hold the levers in such a mannerthat they may be disengaged from the lugs by slight movement of thetrips. The trips are suitably pivoted to-the upper portion of theframework, as by means of a cross-rod 31, and extend upward and areconnected together above the framework by a cross-rod 30.

The operation is as follows: In Figs. 1 and 2 the parts of thestop-motion are in the normal-t. e., inoperative-position. Then therolls are rotating, pins 20 upon the rolls clear pins 24 upon the armswithout engagement. -Should the operator in feeding or tending themachine get his hand caught between the rolls or should any otheraccident happen or should it be desired for any purpose whatever to stopthe rotation of the rolls as quickly as possible and without stoppingthe driving mechanism, the operator or any person by slight movement ofthe cross-rod connecting the trips may cause the trips to release thelong arms of the levers,which will instantly drop by gravity to theposition shown in dotted lines in Fig. 2. In Fig. 3 the pins 20 areshown as having engaged the levers and pressed the short arms of thelevers against the pins 24: upon the arms, oscillating the arms, so thatcontinued movement of the rolls has caused the long arms of the leversto press cross-rod 25 backward against the power of springs 27 andallowed the ends of arms 17 to pass said cross-rod. The instant the armspass the cross-rod the front roll will commence to carry the eccentricbearing-sleeves through the engagement of pins 20 upon the roll with tholevers, which are themselves now locked between pins 20 and pins 2 1upon the arms, as will be readily understood from Fig. 4. As the necksof the front roll are journaled in these eccentric bearingsleeves andthe normal or inoperative position of the parts is with the thinnestportion of the walls of the sleeves in directline with thedriving-pinion,it follows that rotation of the sleeves must carry thefront roll outward and upward away from the back roll, which movementwill continue until the gear-wheel upon the front roll is placed whollyout of engagement with the driving-pinion and the pinion at the oppositeend of the front roll is placed out of engagement with the pinion uponthe back roll, so that rotation of both rolls will stop instantly,leaving the front roll separated appreciably more than the normaldistance from the back roll, such a position of the parts being clearlyindicated in Fig. 4. In starting the rolls again after they have beenstopped through the operation of the stop-motion shaft 34: ispreferablystopped and arms 17, and with them the eccentric bearing-sleeves, areeither moved forward or backward to the position shown in Figs. 1 and 2,the effect of which is to restore the front roll to its operativeposition, as in Fig. 2, arms 17 being now locked against forwardmovement by engagement with cross-rod 25. As soon as the parts areplaced in this position and the long arms of the levers placed inengagement with the trips power may again be applied to thedriving-shaft. I have shown the rear faces of arms 17 as rounded, sothat the cross-rod may be pressed downward against the power of thesprings by the arms themselves if the latter are moved backward toplace. It will be obvious that when returned to the normal position theeccentric bearing-sleeves must remain locked until again released bymovement of the crossrod in the manner described.

I-Iaving thus described my invention, I claim- 1. In a machine of thecharacter described the combination with rolls, of eccentricbearing-sleeves in which one of said rolls is journaled and means forimparting the rotary movem enter the roll to said sleeves, whereby saidroll may be moved outward and upward away from the other roll.

2. In a machine of the character described the combination with rollsand driving connections therefor, of pins 20 extending from the ends ofone of the rolls, eccentric bearing-sleeves in which said roll isjournaled, arms extending from the bearing-sleeves and having pins 24,levers pivoted to the arms, a spring-controlled cross-rod engaged bysaid arms to lock the bearing-sleeves, and trips for holding the leversoutof engagement with the cross-rod, the parts being so arranged thatpins 20 will clear pins 24 and when the levers are released pins 20 and24 will lock the levers and cause them to retract the cross-rod andrelease the arms, continued movement of the rolls carrying the eccentricbearing-sleeves and lifting the roll carried thereby upward and outwardand detaching the driving con: nections.

3. In a machine of the characterdescribed the combination with rolls, ofeccentric bearing-sleeves in which one of said rolls is journaled, armsextendingfrom said sleeves, a spring-controlled cross-rod which isengaged by the arms to lockthe sleeves and means at the control of theoperator whereby movement of the roll is caused to release the arms, androtate the eccentric bearing sleeves, which lift the roll journaledtherein outward and upward away from the other roll.

4. In a machine of the character described the combination with rollsand driving connections therefor, of eccentric bearing-sleeves in whichone of said rolls is journaled, arms extending from said sleeves, aspring-controlled cross-rod which is engaged by the arms to lock thesleeves and means at the control of the operator whereby movement of therolls is caused to retract the cross-rod, which releases the arms, androtate the eccentric bearing-sleeves which lift the roll outward andupward and detach the driving connections.

5. In a machine of the character described the combination with rolls,of eccentric bearing-sleeves in which one of said rolls is journaled,said sleeves having flanges 21, arms detachably connected to saidflanges,-a springcontrolled cross-rod engagedby the armsto lock thesleeves and means at the control of the operator whereby movement of theroll is caused to release the arms and rotate the sleeves, substantiallyas and for the purpose set forth. I

6. In amachine of the character described the combination with rolls, ofeccentric bearing-sleeves in which one of said rollsis journaled, meansfor normallylocking said sleeves against rotation and means whereby themovement of the rolls is caused to release and rotate the sleeves.

.7. In a machine of the character described the combination with rolls,of eccentric bearing-sleeves in which one of said rolls is journaled,arms-extending from said sleeves,

means whereby the arms are. locked and means whereby said armsarereleased and the rolls and sleeves are connected.

, 8. In a machine of: the character described the combination withframework having recesses 26, rolls and eccentric bearing-sleeves saidbearing-sleeves and also provided with pins, levers pivoted to the arms,means for locking the bearing-sleeves and means for normally holding thelevers out of operative position. 7 k I i V I 10. In a machine of thecharacter described the combination with rolls, one of which is providedwith pins extending from the ends thereof, and eccentric bearing sleevesin whichsaid roll, is journaled, of arms extending from saidbearing-sleeves and also provided with pins, levers pivoted to the arms,means, for locking the bearing sleeves and pivoted trips acting tonormally hold the levers out of operative position and provided with across-rod in position to be engaged by the operator. 7 L H 11. In amachine of thecharacter described the combination with rolls, one ofwhichis providedwith a gear-wheel, of a driving-pinion adapted to engagethe gear-wheel, eccentric bearing-sleeves in which the roll carrying thegear-wheelis journaled and meansfor connecting the roll and thebearing-sleeves whereby the roll journaled therein is lifted and thegear-wheel is disengaged from the driving-pinion.

12. y In a machine of the character described the combination withrolls, one of which is; provided with a gear-wheel, of;a driving-pintooion adapted to engage the gear-wheel, eccen trio bearing-sleeves inwhich the rollcarrying the gear-wheel is journaled and means atthecontrol of the operator, whereby the roll an the bearing-sleeves areconnected.

13. In a machine of the character described the combination with rolls,one ofwhich; is

provided with agearwheel and which are provided at their opposite endswith int-ermeshing pinions, of a driving-pinion adapted to engage thegear-wheel, eccentric bearingsieeves in which the roll carrying thegearwheel is journaled, means for norinaliylocking the sleeves and meansat the control of the operator whereby movement of the rolls will unlockthe sleeves and connect the roll and the sleeves, whose forward movement

